Rib knit fabric has the detachability, curling and extensibility of plain weave fabric, while also having greater elasticity. It is often used for the collar and cuffs of T-shirts. It has a good slimming effect and is very elastic. It is mainly used for casual style clothing. It is relative to plain weave. Take socks as an example. The most common cotton socks with nothing on them are plain weave, and those with striped protrusions like corduroy are ribbed.